Thrashing machine



E. BO E.

THRASHING MACHINE. APPLICATION FILED AUG-20, I920. LQQ QZS Patented July4, 1922,

2 SHEETS-SHEET I.

25 mum/r01? fddfioe BY flaw/7%.

A TTOR/VEVS THRASHING MACHINE. APPLICATION FILED AUG.Z0, 1920.

Patented July 4, 1922.

2 SHEETSSHEET 2.

IN V5 11/ T01? A TTOHIVEYS STATEfi QEFFEQE,

EDD 130E, OF CLEABBROOK, MINNESOTA, ASSIGNOR OF ONE-FOURTH TO IRVINDE'WITT KRETSER, 0F CLEARBROGK, MINNESOTA, ONE-FOURTH TO DUSTINW'ALL-AGE MG- NABB, OF WINNIEEG, CANADA, AND ONE-FOURTH. TO EDWIN ARCHERHALSETH,

OIE CLEARBRO OK, MINNESOTA.

THRASHING MACHINE.

' Application filed August 20,

To all whom it may concern Be it known that I, EDD Eon, a citizen of theUnited States, and a resident of Clearbrook, in the county of Olearwaterand State of Minnesota, have invented a new and use ful Improvement inThrashing Machines, of which the following is a full, clear, and exactdescription.

My invention relates to improvements in thrashing machines, and itconsists in thecombinations, constructions, and arrange ments hereindescrlbed and claimed.

An ob ect of my invention 1s t0'proV1 de,.-

in a thrashing machine, a quick means of thrashing the unthrashed grainthat has fallen onto the sieve, which at the present time takes acircuitous path, going through the tailings auger, the tailings elevatorinto the thrashing cylinder, and through the whole machine, thus takingup the room of the new grain.

7 provide, in a thrashing machine, a device of the type described whichis positive in operation, simple to install, and does not easily get outof order.

' Other object and advantages will appear in the followingspecification, and the novel features of the invention will beparticularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming partof this application, in which- Figure 1 is a section through a thrashingmachine, showing the device installed,

Figure 2 is an enlarged side elevation of the device in closed position,

Figure 3 is a plan view, taken on the line 33 of Figure 2,

Figure 4 is a section taken on the line 4-.4 of Figure3,

Figure 5 is a s1de elevation of the device in open position,

Figure 6 is a sectional view of an enlarged portion of the device.

In carrving out my invention, I make use of a thrashing machine 1 ofknown construc- Specification of Letters Patent.

Patented July 4, 1922.

1320. Serial No. 404,887.

tion (see Figure 1) in which a thrashing cylinder 2 is disposed betweena chalfer 3 and a sieve 4. The thrashing cylinder 2 has longitudinallyextending slats 6 having a plurality of teeth 7 integral with saidslats. The thrashing cylinder 2 is keyed to a shaft 8, said shaft havinga pulley 9 mounted at one end (see Figure 3). A casing 10, concentricwith the periphery of the thrashing cylinder 2, encircles said thrashingcylinder. It will he noted that the chafier 3 extends to within a spaceddistance from the casing. Disposed between the casing 10 and the teeth 7of the lower half of the thrashing cylinder 2 are a plurality oflongitudinally extending concave bars 11 having a plurality of teeth 12integral therewith. The teeth 7 of the thrashing cylinder 2 are disposedbetween the teeth 12 of the arcuate slats 11.

A roller 13 made fast on the shaft 14 is corrugated longitudinally and,laterally. A pulley 15 is fastened on one end of the shaft 14. A disc 16is loosely mounted on the other end of the shaft 14. Pivotally mountedon the disc 16 by a screw 16' is an arm 17 having a longitudinallyextending slot 18 at its free end. A ratchet wheel 19 is fastened on theshaft 14 and is adjacent to the outer surface of the disc 16. A pawl 20pivotally held by a pin 21 is adapted to come into engagement with theratchet wheel 19. A spring 22, encircling the screw 16', acts as awasher for the arm 17, thus spacing said arm 17 from the disc 16 so asto allow the ratchet 19 to pass freely under it. One end of the spring22 engages the head of the pawl 20.

A false bottom 23 has one of its longitudinal sides made fast to a rod24. The rod 24 is jourualed in-each of the side walls of sieve 4, thusassuring a continuous passage way from the sieve 4 to the thrashingcylinchaff from the grain threshed by the cylinit to the thrashingcylinder 2, but the bolt," being thicker than the grain, forces thefalse ing fan.

der 2, with the roller 13 normally acting as a feeder of the grain tothe drum 2.

From the foregoing description of the various parts of the device, theoperation thereof will be readily understood. The unthreshed grain isfed into the machine in the customary manner. After the grain has gonethrough the thresher, the chaff is eX- pelled through the straw chute.The threshed grain and the unthreshed heads of grain drop onto thescreen 4 from the chalfer The threshed grain drops through the sieve 4to the screen 28 where itis delivered to the grain auger 29. The grainauger is shown diagrammatically in Fig. 1, of the drawing, since it is apart of the ordinary thresher. The unthreshed heads of grain, however,are prevented from passing through the screen 4 and are moved towardsthe roller 13' by means of the draft from the grain cleaning fan 30, andby' the suction from the stacker fan (not shown). The direction of thedraft from the fan 30 is indicated by the arrows in F 1. The

roller 13 conveys the unthreshed grain to the thrashing cylinder 2,where it is threshed and carried back to the sieve 4. This operation isrepeated until all of the unthreshed grain is threshed. The chafl fromthe grain which is threshed by the cylinder 2 is carried to the stackerfan by the suction of the fan, and by the draft from the grain clean-The grain feeding fan 30 is a part'of the ordinary thresher and forms nopart of my present invention except in so far as it cooperates with theother parts-of the device. It is obvious that the unthreshedheads ofgrain are tooheavy to be carried upwardly by the draft from the fan 30.The draft from the fan 80. however, carries the der 2 up between thecasing 10 and the straw rack 31 Assume that some foreign substance, for

an example, a bolt. has obtained entrance into the machine. It iscarried alongwith the grain and finally drops onto the sieve 4. Thecorrugated roller 13 starts to feed bottom 23 down slightly, thuscausing the rod 24 to turn and its end 26 to release an extended arm 29of the pawl 20. This frees the pawl 20 from contact with the rod 24, andthe spring 22 throws the pawl 20 into "engagement with the ratchet wheel19. The

' ratchet wheel 19,; continually turning with Figure 2) the shaft 14,carries the nawl 20 which is pivoted to the disc 16, thus rotatingsaid'disc in the direction shown by an arrow (see The rotation of thedisc 16 causes the screw 16' to be carried with it. As the screw 16 iscarried around the 16;"the arm 17, pivoted to the screw 16, drops to theposition shown in- Figure- 5, carrying with it the bent portion 26 ofthe rod 24. This movement turns the rod 24, thus opening the falsebottom 23', which is fastened to said rod 24 and drops the bolt onto theground. The pawl 20 is still held in engagement with the ratchet wheel'19 by the spring 22, thus keeping the disc rotating with the ratchetwheel. The bent portion 26 of the rod 24 is swung back to normalposition (see Figure 2) by the arm 17, which is carried by the screw 16on the rotating disc 16. The bent portion 26 comes into contact with thearm 29 of the pawl 20. This throws the pawl out of engagement with theratchet wheel 19, and the disc 16 immediately stops rotating, leavingthe device in normal position (see Figure'2).

If another foreign substance forces the false bottom slightly open, thusreleasing the bent portion 26 of the rod 24 from the arm 29 of the pawl20, the same operation again takes place.

It is obvious that many modifications and adaptations of the form of thedevice pictured in the accompanying drawings may be provided withoutdeparting from the spirit and scope of my invention.

I claim: 7

1. In a thrashing machine, means for thrashing grain, including achaffer, a sieve parallel to and spaced from said chaffer, an

auxiliary thrashing means disposed between said chatter and said sieve,said auxiliary thrashing means comprising a thrashing cylinder having aplurality of teeth mounted thereon, a concave having a plurality ofteeth disposed between the teeth o-f said thrashing cylinder, wherebygrain is drawn through the teeth of Sitld COIlCfiLVG by the teeth ofsaid thrashing cylinder, thus thrashthereon, a concave having aplurality of teeth disposed between the teeth or said thrashingcylinder, whereby grain is drawn through the teeth of said concave bythe teeth of said thrashing cylinder, thus-thrashing the grain, andmeans for returning the grain'threshed by said auxiliary means to saidchatter comprising a casing concentric with said drum, sai'd casingterminating just above said chaffer, thus providing a passageway for thethreshed grain between said drum and said casing to said chafler.

3. In a thraslnng mach1ne, means for thrashing grain, lIlclli'dlng acha-fler', a sieve parallel to and spaced from said chaffer, anauxiliary thrashing means disposed between said chaifer and said sieve,and means for feeding grain to said auxiliary thrashing means, said lastnamed means being adapted to automatically eject any foreign substancecarried by the grain.

4.1n a thrashing machine, means for thrashing the grain, including achaffer, a sieve parallel to and spaced from said chafier, a rotatablethrashing cylinder disposed between said chafl er and said sieve, acasing concentric to said cylinder and means for feeding said rotatablethrashing drum, said means being adapted to automatically eject anyforeign substance carried by the grain and comprising a false bottomdisposed between said casing and said sieve, a rotatable roll positioneddirectly above said false bottom, whereby said roll draws the grainbetween it and the false bot-tom, thus feeding grain to said rotatablethrashing cylinder.

5. In a thrashing machine, means for thrashing grain, and means forautomatically ejecting any foreign substance carried with the grain,said second named means comprising a rotatable rod, a false bottomfastened to said rod, a rotatable shaft positioned above and parallel tosaid false bottom and supported by the Walls of said thresher, acorrugated roller made fast to said shaft, a disc loosely mounted on oneend of said shaft, a pawl pivotally mounted on said disc having its armextending beyond the periphery of said disc, a ratchet wheel adjacent tothe outside face of said disc and fastened to said shaft, an armpivotally mounted on said disc at a point diametrically opposite saidpaWl and spaced from said disc, whereby said ratchet is free to passbetween said disc and said arm, said arm having a longitudinallyextending slot, a bent end portion of said rotatable rod being slidablymounted in said slot, means for yieldingly holding the bent end portionof said rod in the upper end of said slot, and means for yieldinglyretaining said pawl in engagement with said ratchet wheel.

EDD BOE.

